EMCA:A New Efficient Multi-replica Auditing Scheme in Multi-cloud Storage
Cloud data auditing is a technology that allows data owners to check whether data is stored intact on remote cloud servers without downloading the data.At present,cloud data auditing can be divided into single-replica auditing and multi-replica auditing.Aiming at the shortcomings of high computational overhead and inability to audit multi-cloud storage data in the multi-replica audit scheme,an efficient multi-replica cloud data audit scheme in multi-cloud scenarios is proposed.The proposed scheme uses a lightweight modular exponentiation encryption technique to replace the traditional bilinear pairing technique with high computational cost,so as to reduce the computational overhead in the audit process and improve the efficiency of the scheme.A homomorphic verification tag(HVT)is generated for each copy data block as metadata.When the user issues an audit request,each cloud service provider generates corresponding evidence,and the cloud server manager aggregates evidence to realize auditing in multi-cloud storage.The security analysis shows that the proposed scheme can withstand the forgery attacks of malicious cloud service providers and the collusion attacks of malicious cloud service providers and third-party auditors.The performance analysis shows that the computational overhead of the proposed scheme is lower than that of the existing multi-replica audit scheme,and the efficient multi-replica audit of multi-cloud storage is realized.
cloud storagedata auditmodular power encryptionmulti-replica storagemulti-cloud storage
万方数据
维普
